package day1.demo7;

import java.nio.charset.StandardCharsets;
import java.util.*;

public class Test2 {
    public static void main1(String[] args) {
        Integer i1 = 127;
        Integer i2 = 127;
        i1 = Integer.valueOf(300);
        System.out.println(i1==i2);
    }

    public static void main(String[] args) throws Exception {
        String s = "wwww你";
        String s2 = s.replace("a", "hello");
        System.out.println(s2);
    }
}


